scholarly journals Multi Scale Models for Flexure Deformation in Sheet Metal Forming

2016 ◽  
Vol 80 ◽  
pp. 06002
Author(s):  
Edmondo Di Pasquale
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Multi Scale ◽  
Scale Models

Multi-scale friction modeling for sheet metal forming: The boundary lubrication regime

2015 ◽  
Vol 81 ◽  
pp. 112-128 ◽  
Author(s):  
J. Hol ◽  
V.T. Meinders ◽  
M.B. de Rooij ◽  
A.H. van den Boogaard
Keyword(s):  
Sheet Metal ◽  
Boundary Lubrication ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Friction Modeling ◽  
Multi Scale ◽  
Lubrication Regime

Multi-Scale Contact Modeling of Coated Steels for Sheet Metal Forming Applications

2018 ◽  
Vol 767 ◽  
pp. 223-231 ◽  
Author(s):  
Meghshyam Shisode ◽  
Javad Hazrati ◽  
Tanmaya Mishra ◽  
Matthijn de Rooij ◽  
Ton van den Boogaard
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Normal Load ◽  
Steel Substrate ◽  
Surface Textures ◽  
The Real ◽  
Multi Scale ◽  
Real Area Of Contact ◽  
Real Area

Friction in sheet metal forming is a local phenomenon which depends on continuously evolving contact conditions during the forming process. This is mainly influenced by local contact pressure, surface textures of the sheet metal as well as the forming tool surface profile and material behavior. The first step for an accurate prediction of friction is to reliably estimate real area of contact at various normal loads. In this study, a multi-scale contact model for the normal load is presented to predict asperity deformation in coated steels and thus to estimate the real area of contact. Surface profiles of the zinc layer and steel substrate are modelled explicitly obtained from confocal measurements. Different mechanical properties are assigned to the zinc coating and the steel substrate. The model was calibrated and validated relative to lab-scale normal load tests using different samples of zinc coated steel with distinct surface textures. The results show that the model is able to predict the real area of contact in zinc-coated steels for various contact pressures and different surface textures. Current multi-scale model can be used to determine the local friction coefficient in sheet metal forming processes more accurately.

A Multi-scale Friction Model for Sheet Metal Forming Simulations

2011 ◽  
Author(s):  
J. Hol ◽  
M. V. Cid Alfaro ◽  
T. Meinders ◽  
J. Huétink
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Friction Model ◽  
Multi Scale ◽  
Forming Simulations

ИССЛЕДОВАНИЕ ТОЧНОСТИ ДЕТАЛЕЙ, ПОЛУЧАЕМЫХ ПРИ РАЗДЕЛИТЕЛЬНЫХ ОПЕРАЦИЯХ В ПЕРЕНАЛАЖИВАЕМЫХ ШТАМПАХ

2018 ◽  
pp. 52-63
Author(s):  
Е. А. Фролов ◽  
В. В. Агарков ◽  
С. И. Кравченко ◽  
С. Г. Ясько
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Balance Method ◽  
Experiment Planning ◽  
Practical Recommendations

To determine the accuracy of the readjustable punches for separating operations (perforation + punching out) of sheet-metal forming, the accuracy parameters were analyzed using the random balance method using the method of experiment planning. Analytical dependencies are obtained to determine the values of deviation of the outer and inner contour dimensions of perforated and punched out sheet parts. From the dependencies obtained, it is possible to estimate and predict the value of deviation in the dimensions of the resulting part at any time during the operation of the punch. Practical recommendations on the calculation of the actuating dimensions of the working elements (stamping punch, matrix) of readjustable punches are offered.

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